By face value, practically nothing. Fifty Mexican cents (which is the translation of "cincuenta centavos") is 0.5 Mexican pesos, but the peso has since been redefined since 1983; what used to be called 1,000 pesos is now called 1 peso. Therefore, the coin's face value is 0.0005 Mexican pesos, which is less than a hundredth of a United States cent. I wouldn't expect an ordinary 1983 coin to have any special value to collectors, but I'm no numismatist.
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Unless it is a "proof" coin (actual silver), it is worth one dollar.
Your 1981 Mexican 20 peso coin is made of cupro-nickel and worth less than a dollar if circulated (and maybe $2 or $3 if uncirculated).
Unless it is a "proof" coin (actual silver), it is worth one dollar.
Not enough information. Please post a new question with the coin's date and denomination. Note that the "$" sign on a Mexican coin represents Mexican pesos, not U.S. dollars.
Eisenhower was on the DOLLAR coin in the 1970s. KENNEDY has been on the half dollar since 1964. A 1985 Kennedy half is still worth 50 cents.
It is a coin worth one dollar.
as of February 18, 2012, a 1000 peso Mexican bill from 1985 is worth about 75 cents.
the worth value of the liberty dollar coin is worth 50cents.
The bicentennial dollar coin is still worth one dollar.
It contains no precious metals -- worth about $2.00